"Jack hasn't said no, which is very encouraging to Bob," the source said. "But he needs Jack more than Jack needs him, so there are a lot of emails, phone calls and gifts going Jack's way."

So he's sending women over to Nicholson's house?

After Nicholson appeared in the 2010 flop "How Do You Know" with Reese Witherspoon, he decided to step away from acting. Rumors flew that Nicholson retired because he was having trouble remembering lines, an idea Nicholson's camp dismissed.

The source said the "Iron Man" actor and director Guy Ritchie "are both courting Jack for the movie and Bob's even cutting his fee in the movie so Jack can get the most money he's been paid since the '90s.